The document discusses social mobility, which refers to the movement of individuals within a social structure to different social statuses or positions. There are two types of social mobility: vertical mobility involves movement between higher and lower social statuses, while horizontal mobility involves changes within the same social status level. Some examples of vertical mobility are promotion to a higher position or demotion to a lower position. Horizontal mobility includes changes like switching occupations but maintaining similar conditions and prestige. Factors that can influence social mobility include economic conditions, education levels, intelligence, the structure of society, and demographic characteristics.